WM
William Mccullough — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this William Mccullough across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Cornelius & Anna — first a son (b.~1909), then head of a 6-person household.
Age 31
b. ~1909
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | McCullough |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Lansdowne borough |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Salesman |
| Industry | Office Machinery |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 1100 |
| Highest Grade | Hs-4 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Salesman |
| Township / Ward | Lansdowne Borough |
| Est. Birth Year | ~1909 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Cornelius Mccullough | Son | — | 35 | ~1905 |
| Eleanor Mccullough | Daughter | — | 22 | ~1918 |
| Cornelius Mccullough | Head | — | 63 | ~1877 |
| Francis Mccullough | Son | — | 36 | ~1904 |
| William Mccullough | Son | — | 31 | ~1909 |
| Anne Mccullough | Daughter | — | 33 | ~1907 |
Census Appearances
1920
Delaware, Pennsylvania
Son, age 10
Delaware, Pennsylvania · implied b. ~1910 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCullough |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Delaware, Pennsylvania
Son, age 21
Delaware, Pennsylvania · implied b. ~1909 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCullough |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Salesman |
| Industry | Real Estate |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Son, age 31
Delaware-County, Pennsylvania · implied b. ~1909 — 6 household members
| Surname | McCullough |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Lansdowne borough |
| 1935 Residence (County) | Delaware |
| Occupation | Salesman |
| Industry | Office Machinery |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 1100 |
| Highest Grade | Hs-4 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links William Mccullough across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Cornelius Mccullough (~0.92 confidence) and mother Anna Mccullough (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Cornelius Mccullough
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Anna Mccullough
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mccullough
Son · 1940 · age 31 · b. ~1909 · Pennsylvania
★ You are viewing this record
Sibling
Eleanor Mccullough
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Mccullough
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cornelius Mccullough
Sibling · 1940 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mccullough
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03493-00259)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sarah L. Smith | 63 | Head | — | Pennsylvania |
| 2 | James Johnston | 63 | Head | Salesman | North Ireland |
| 3 | Elizabeth G. Johnston | 57 | Wife | Saleslady | North Ireland |
| 4 | Rebecca M. Walker | 36 | Daughter | — | Pennsylvania |
| 5 | Alfred X. Walker | 35 | Son in law | Clerk | England |
| 6 | Alfred X. Jr. Walker | 11 | Grandson | — | Pennsylvania |
| 7 | George W. Andersson | 73 | Head | Carpenter | New Jersey |
| 8 | Louise S. Andersson | 57 | Wife | — | Pennsylvania |
| 9 | John P. Shock | 25 | Lodger | Clerk | Pennsylvania |
| 10 | John R. Huston | 52 | Head | Salesman | Pennsylvania |
| 11 | Lillian C. Huston | 51 | Wife | — | Pennsylvania |
| 12 | Dorothy F. Huston | 28 | Daughter | Secretary | Pennsylvania |
| 13 | Marguerite C. Huston | 21 | Daughter | File Clerk | Pennsylvania |
| 14 | Robert N. Macdonald | 49 | Head | Educational Engineer | New Jersey |
| 15 | Maude C. Macdonald | 45 | Wife | — | New York |
| 16 | F. Alex Mackennon | 37 | Head | Salesman | New York |
| 17 | Eleanor Mackennon | 38 | Wife | — | Pennsylvania |
| 18 | Donald A. Mackennon | 15 | Son | — | Pennsylvania |
| 19 | Doris C. Mackennon | 13 | Daughter | — | Pennsylvania |
| 20 | Shirley J. Mackennon | 9 | Daughter | — | Pennsylvania |
| 21 | Richard W. Mackennon | 1 | Son | — | Pennsylvania |
| 22 | Maude B. Mackennon | 63 | Mother | — | Maryland |
| 23 | Eleanor M. Barber | 54 | Aunt | Floor Supervisor | Maryland |
| 24 | Edna M. Houck | 45 | Head | File Clerk | Pennsylvania |
| 25 | Mary A. Houck | 71 | Mother | — | Pennsylvania |
| 26 | Marie V. Houck | 27 | Sister | Secretary | Pennsylvania |
| 27 | Merritt M. Houck | 44 | Brother | Baker | Pennsylvania |
| 28 | Maurice S. Houck | 29 | Brother | Clerk | Pennsylvania |
| 29 | Lottie C. Houck | 26 | Sister in law | — | Pennsylvania |
| 30 | William J. Harkins | 38 | Head | Statistician | Pennsylvania |
| 31 | Mildred G. Harkins | 38 | Wife | — | Pennsylvania |
| 32 | Mildred A. Harkins | 10 | Daughter | — | Pennsylvania |
| 33 | Lois M. Harkins | 7 | Daughter | — | Pennsylvania |
| 34 | William J. Harkins | 3 | Son | — | Pennsylvania |
| 35 | Cornelius, Sr. Mccullough | 63 | Head | Postmaster | Pennsylvania |
| 36 | Francis C. Mccullough | 36 | Son | Plumber | Pennsylvania |
| 37 | Cornelius F. Mccullough | 35 | Son | Roofer | Pennsylvania |
| 38 | Anne M. Mccullough | 33 | Daughter | — | Pennsylvania |
| 39 | William J. Mccullough THIS PERSON | 31 | Son | Salesman | Pennsylvania |
| 40 | Eleanor M. Mccullough | 22 | Daughter | Typist | Pennsylvania |
Pedigree Summary
William + 4 siblings
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)